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wudi ebbf60fdec [fix](streamingjob) Prevent MySQL CDC data loss on keepalive reconnect for non-GTID (#66998)
### What problem does this PR solve?

Problem Summary:

When a non-GTID MySQL transaction is being delivered and the event
listener is blocked by backpressure, the keepalive thread can reconnect
after the in-memory binlog position has advanced into the transaction.
The reconnect then resumes from the middle of the transaction and can
silently skip rows.

This change tracks the start of an incomplete non-GTID transaction and
rewinds to that position before a keepalive reconnect. Completed
transactions clear the replay state. It also separates the CDC progress
heartbeat from the connection keepalive interval and uses the configured
progress heartbeat as the MySQL protocol heartbeat.

The Failsafe test classpath now uses the compiled classes directory so
integration tests exercise locally overridden dependency classes instead
of the repackaged application artifact.
2026-08-25 09:59:55 +08:00

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